Three months after Budi was found by charity workers in Kubing, Borneo, heartwarming photos have emerged of the mammal on the mend.

Alan Knight OBE, CEO of the International Animal Rescue, said: "It’s hard to believe this healthy young infant is the same poor creature we found lying on his back in a cage, completely unable to move or sit up.

"When Budi was rescued he was so weak and fragile that we all feared he wouldn’t survive.